Hint :A non-crystalline homogeneous material made up of large molecules or ultramicroscopic particles of one substance scattered within another. Gels, sols, and emulsions are examples of colloids; the particles do not settle and cannot be isolated by ordinary filtering or centrifugation as they can in a suspension.
Complete Step By Step Answer: The term colloidal suspension unambiguously refers to the entire mixture (although a narrower sense of the word suspension is distinguished from colloids by larger particle size). There is a Dispersed phase (the suspended particles) and a Dispersed medium in a colloid (the medium of suspension). The dispersed phase particles are $ 1 $ nanometre to $ 1 $ micrometre in diameter. The Tyndall effect, which is the scattering of light by particles in a colloid, causes certain colloids to be translucent. Other colloids can be transparent or have a tint. Interface and colloid science are concerned with colloidal suspensions. Italian chemist Francesco Selmi first developed this area of study in $ 1845 $ , and Scottish scientist Thomas Graham has been researching it since $ 1861 $ . Dispersed Phase: In a Dispersed phase, a liquid suspended in the form of fine droplets. Colloids are categorised into the following categories based on the types of particles in the dispersed phase: Multimolecular Colloids: When smaller molecules of a substance or several atoms dissolve, they merge to form a species with a size that falls within the colloidal size range. The resulting species is called a multimolecular colloid. Macromolecular Colloids: The macromolecules in this form of colloids are extracted from a solution using a suitable solvent. The particles in the macromolecular solution are within the colloidal particle size range. As a result, the macromolecular colloid is another name for this solution. In several ways, the colloid produced here is close to that of the actual solution, and it is extremely stable. Associated Colloids: When present in low concentrations, certain compounds behave as solid electrolytes, but when present in high concentrations, they act as colloidal solutions. Particles accumulate at higher concentrations, exhibiting colloidal behaviour. Micelles are microscopic aggregates of particles. The Associate colloids are another name for them. Dispersed Medium: A Dispersed medium is made up of two media that do not mix. It consists of isolated elements from one medium that are distributed in a second dispersed medium. In essence, both media can be very different. They may be a gas, a liquid, or a solid, for example. Dispersed Phase and Dispersed Medium
Note : A dispersion is a process by which scattered particles of one material are distributed in a continuous phase of another substance. Suspensions are particle dispersions that are too large for sedimentation, whereas colloids and solutions are particle dispersions with smaller particles.